Listen Live
Donate
 on air
    Schedule

    KCRW

    Read & Explore

    • News
    • Entertainment
    • Food
    • Culture
    • Events

    Listen

    • Live Radio
    • Music
    • Podcasts
    • Full Schedule

    Information

    • About
    • Careers
    • Help / FAQ
    • Newsletters
    • Contact

    Support

    • Become a Member
    • Become a VIP
    • Ways to Give
    • Shop
    • Member Perks

    Become a Member

    Donate to KCRW to support this cultural hub for music discovery, in-depth journalism, community storytelling, and free events. You'll become a KCRW Member and get a year of exclusive benefits.

    DonateGive Monthly

    Copyright 2026 KCRW. All rights reserved.

    Report a Bug|Privacy Policy|Terms of Service|
    Cookie Policy
    |FCC Public Files|

    Back to Good Food

    Good Food

    Mastered sourdough? Nerd out over macroscopic mold

    Koji is a mold that survives by growing on its food source, secreting enzymes that perform special tasks such as breaking down starches into simple sugars.

    • rss
    • apple-podcasts
    • spotify
    • Share
    By Evan Kleiman • Dec 22, 2020 • 1 min read

    Koji is a mold that survives by growing on its food source, secreting enzymes that perform special tasks such as breaking down starches into simple sugars. Koji does the hard work, kickstarting fermentation, while Jeremy Umansky and Rich Shih reap the rewards of creating complex boosts of flavor. Their book is “Koji Alchemy.”

    Honeysuckle, chestnuts, and grapefruit is how Rich Shih describes the characteristic aroma of koji. Rich and Jeremy Umansky suggest how to put it to work in their book, “Koji Alchemy.” Photo courtesy of Chelsea Green.

    The full episode

    5 of 6
    Seeds, soil science, flavors of wood, untamed food
    1. 0:00Traveling inside fruit: a children’s reading about seeds
    2. 3:01Soil scientist wins the agricultural equivalent of Nobel Peace Prize
    3. 13:30Trees, wood, flavor: the obsession of a woodland biologist
    4. 25:20From Borneo to Sweden, searching for the world’s last untamed foods
    5. 35:45Mastered sourdough? Nerd out over macroscopic moldYou’re reading this
    6. 47:43Shutout from the farmer’s market, siblings explore their pivot options
    • https://images.ctfassets.net/2658fe8gbo8o/AvYox6VuEgcxpd20Xo9d3/769bca4fbf97bf022190f4813812c1e2/new-default.jpg?h=250

      Evan Kleiman

      host 'Good Food'

    • https://images.ctfassets.net/2658fe8gbo8o/AvYox6VuEgcxpd20Xo9d3/769bca4fbf97bf022190f4813812c1e2/new-default.jpg?h=250

      Laryl Garcia

      Senior Director, Good Food

    • https://images.ctfassets.net/2658fe8gbo8o/AvYox6VuEgcxpd20Xo9d3/769bca4fbf97bf022190f4813812c1e2/new-default.jpg?h=250

      Gillian Ferguson

      Supervising Producer, Good Food

      CultureFood & DrinkBooks

    The full episode

    5 of 6
    Seeds, soil science, flavors of wood, untamed food
    1. 0:00Traveling inside fruit: a children’s reading about seeds
    2. 3:01Soil scientist wins the agricultural equivalent of Nobel Peace Prize
    3. 13:30Trees, wood, flavor: the obsession of a woodland biologist
    4. 25:20From Borneo to Sweden, searching for the world’s last untamed foods
    5. 35:45Mastered sourdough? Nerd out over macroscopic moldYou’re reading this
    6. 47:43Shutout from the farmer’s market, siblings explore their pivot options
    Back to Good Food